iOS 5.1.1 Untethered Jailbreak Out Now : How To Jailbreak iOS 5.1.1 ~ Blog O'Nerd

Good news everyone. The latest untethered jailbreak for iOS 5.1.1 is out now. This time again pod2g is the magician behind this jailbreak pleasure. pod2g and the chronic dev team has released the very latest iOS 5.1.1 untethered jailbreak at Hack in The Box conference Amsterdam as expected. So if you were one of those waiting for an untethered jailbreak for your iDevice on iOS 5.1.1, your wait overs now. pod2g was working on iOS 5.1 untethred jailbreak since a few weeks and when Apple released iOS 5.1.1, he tested his exploits with 5.1.1 too. Hopefully his exploits have worked in iOS 5.1.1 too and here is the untethered jailbreak today.

Requirements
A supported iDevice. Supported device list is as below.

iPhone 3GS, iPhone 4, iPhone 4 CDMA, iPhone 4S
iPad 1
iPad 2 Wifi, iPad 2 GSM, iPad 2 CDMA, iPad 2,4 (new iPad 2)
iPad 3 Wifi, iPad 3 CDMA, iPad 3 Global
iPod 3G
iPod 4G
Apple TV 2

Apple TV3 is not supported.
~~Support for iPad2,4 will be released later.~~iPad 2,4 is now supported.

Download Absinthe Jailbreak tool for your operating system.

How to jailbreak iOS 5.1.1?

A) If you are already on iOS 5.1.1, without having tethered jailbreak.

Step 1
Connect your device to iTunes and sync it (or right click on your device name and click backup). It will make sure you have the latest backup. Close iTunes after backup is complete.

Step 2
Now go to Settings – General – Reset – Erase all Content and Settings on your device. You will have to do this as it will make jailbreak process faster.

Step 3
Keep your device connected to computer. Open Absinthe. It will extract files now (on Windows, not sure about the others). After extracting files, there will be a folder named "absinthe-win-2.0" in the Absinthe folder itself. Open that folder and run absinthe.exe.

Step 4
Click Jailbreak and wait for the process to complete. Make sure you do not disconnect your device.

Step 5
After jailbreak successfully completes and your device reboots, open iTunes and right click on the device name. Click Restore from Backup and select the backup you created before jailbreaking. This will get you your data back.

B) If you are already on iOS 5.1.1, having tethered jailbreak.
If you are already having a tethered jailbreak on iOS 5.1.1, then open Cydia and search for "Rocky Racoon 5.1.1 Untether". Install "Rocky Racoon 5.1.1 Untether" and reboot. You are done.

C) If you are not on iOS 5.1.1.
If you are not on iOS 5.1.1 already but wish to upgrade and jailbreak iOS 5.1.1, then restore your device using a custom iOS 5.1.1 IPSW. After restoring, use method A) above to jailbreak your device.

How to unlock my iPhone on iOS 5.1.1?
You can unlock your iPhone on iOS 5.1.1 if you have preserved unlockable baseband. Current ultrasn0w unlock supports a few basebands. If you have unlcokable basebamd, then open Cydia, search for ultrasn0w and install it. Reboot your device and you are done.

ultrasn0w requirements - iPhone 3G, iPhone 3GS, or iPhone 4 with baseband - 01.59.00 (in iPhone 4) 04.26.08, 05.11.07, 05.12.01 or 05.13.04 (in iPhone 3G and 3GS). If you used iPad basbeand 06.15.00 in past, you can unlock too.

If you don't have ultrasn0w unlockable device or basbeand, you can try R-SIM or Gevey SIM. Make sure they supports iOS 5.1.1 and your iPhone's baseband.

I don't have official SIM, how do I activate my iPhone?
~~You have to wait until iH8sn0w release latest sn0wbreeze. It will allow you to activate your device without official SIM.~~

Update: Step by step tutorial on How to Jailbreak, Activate and Unlock iphone on iOS 5.1.1 has been posted. Read it here.